In this paper, a distributed control strategy is proposed to make a complex dynamical network achieve cluster synchronization, which means that nodes in the same group achieve the same synchronization state, while nod...In this paper, a distributed control strategy is proposed to make a complex dynamical network achieve cluster synchronization, which means that nodes in the same group achieve the same synchronization state, while nodes in different groups achieve different synchronization states. The local and global stability of the cluster synchronization state are analyzed. Moreover, simulation results verify the effectiveness of the new approach.展开更多
A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which i...A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy.展开更多
The failure prone production systems are examined. For the hybrid systems, the failure of machines is unavoidable. By introduced the idea of purchasing extra capacity to the system, a so-call blockage hedging point is...The failure prone production systems are examined. For the hybrid systems, the failure of machines is unavoidable. By introduced the idea of purchasing extra capacity to the system, a so-call blockage hedging point is obtained. Meanwhile, a near-optimal method is presented to determine the optimal buffer sizes. The continuous flow model of the unreliable manufacturing systems is considered and the control point policy is involved in. Numerical results not only testify the method and show us its application but also to some extent show the impact of the machines＇ failure rate on the optimal buffer size.展开更多
基金supported by the Natural Science Foundation of Hohai University under Grant No.2008429211
文摘In this paper, a distributed control strategy is proposed to make a complex dynamical network achieve cluster synchronization, which means that nodes in the same group achieve the same synchronization state, while nodes in different groups achieve different synchronization states. The local and global stability of the cluster synchronization state are analyzed. Moreover, simulation results verify the effectiveness of the new approach.
基金Supported by the National Natural Science Foundation of China(No.50875054)Weihai Science and Technology Development Plan Project(No.2012DXGJ13)
文摘A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy.
基金This research is supported by the Project of the Great Technology Innovation of Gansu Province, China（2GS063-A52-005-01） and the Natural Science Foundation of Gansu Province, China（3XS062-B25-034）.
文摘The failure prone production systems are examined. For the hybrid systems, the failure of machines is unavoidable. By introduced the idea of purchasing extra capacity to the system, a so-call blockage hedging point is obtained. Meanwhile, a near-optimal method is presented to determine the optimal buffer sizes. The continuous flow model of the unreliable manufacturing systems is considered and the control point policy is involved in. Numerical results not only testify the method and show us its application but also to some extent show the impact of the machines＇ failure rate on the optimal buffer size.
